.BK2 File Extension
- Developer by: Microsoft
- Category: System Files
- Format: Binary
What is an .BK2 file?
.BK2 is Windows Indexing Service Data File
System file used by Microsoft Windows' Indexing Service component, which indexes file system information for searching; often created in the C:\System Volume Information\catalog.wci\ directory and stores data used for performing file system searches.
Similarly to .BK1 files, BK2 files are typically seen with the filename propstor.bk2.